有没有用来关闭计算机的函数或消息呀！

[xionghaifeng]

有没有用来关闭计算机的函数或消息呀！

[liu_feng_fly]

ExitWindowsEx
The ExitWindowsEx function either logs off the current user, shuts down the system, or shuts down and restarts the system. It sends the WM_QUERYENDSESSION message to all applications to determine if they can be terminated.

BOOL ExitWindowsEx(
UINT uFlags, // shutdown operation
DWORD dwReserved // reserved
);

[flybusflybus]

參數怎么掉呢?比如我的菜單里有一個關電腦項﹗

[wavecheng]

EWX_LOGOFF Shuts down all processes running in the security context of the process that called the ExitWindowsEx function. Then it logs the user off.
EWX_POWEROFF Shuts down the system and turns off the power. The system must support the power-off feature.
Windows NT/2000 or later: The calling process must have the SE_SHUTDOWN_NAME privilege. For more information, see the following Remarks section.

EWX_REBOOT Shuts down the system and then restarts the system.
Windows NT/2000 or later: The calling process must have the SE_SHUTDOWN_NAME privilege. For more information, see the following Remarks section.

EWX_SHUTDOWN Shuts down the system to a point at which it is safe to turn off the power. All file buffers have been flushed to disk, and all running processes have stopped. If the system supports the power-off feature, the power is also turned off.
Windows NT/2000 or later: The calling process must have the SE_SHUTDOWN_NAME privilege. For more information, see the following Remarks section.



This parameter can optionally include the following values. Value Meaning
EWX_FORCE Forces processes to terminate. When this flag is set, the system does not send the WM_QUERYENDSESSION and WM_ENDSESSION messages. This can cause the applications to lose data. Therefore, you should only use this flag in an emergency.
EWX_FORCEIFHUNG Windows 2000 or later: Forces processes to terminate if they do not respond to the WM_QUERYENDSESSION or WM_ENDSESSION message. This flag is ignored if EWX_FORCE is used.

[rainwind]

ExitWindowsEx(EWX_POWEROFF);
98下没什么问题,但在NT和2000下要有权限,具体查一下MSDN就知道了

[xionghaifeng]

我用EWX_POWEROFF
为什么关不掉？

[wavecheng]

Windows NT/2000 or later: The following example enables the SE_SHUTDOWN_NAME privilege and then shuts down the system.

HANDLE hToken;
TOKEN_PRIVILEGES tkp;

// Get a token for this process.

if (!OpenProcessToken(GetCurrentProcess(),
TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
error("OpenProcessToken");

// Get the LUID for the shutdown privilege.

LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME,
&tkp.Privileges[0].Luid);

tkp.PrivilegeCount = 1; // one privilege to set
tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;

// Get the shutdown privilege for this process.

AdjustTokenPrivileges(hToken, FALSE, &tkp, 0,
(PTOKEN_PRIVILEGES)NULL, 0);

// Cannot test the return value of AdjustTokenPrivileges.

if (GetLastError() != ERROR_SUCCESS)
error("AdjustTokenPrivileges");

// Shut down the system and force all applications to close.

if (!ExitWindowsEx(EWX_SHUTDOWN | EWX_FORCE, 0))
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~修改就行了
error("ExitWindowsEx");